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Related Concept Videos

Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective response...
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Energy Balance01:19

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Related Experiment Video

Updated: May 31, 2026

Determining the Contribution of the Energy Systems During Exercise
11:15

Determining the Contribution of the Energy Systems During Exercise

Published on: March 20, 2012

Relative Energy Deficiency in Sport.

Mary E Caldwell1, Carly Watson2, Laura Giambra3

  • 1VCU School of Medicine, Virginia Commonwealth University, Richmond, VA, USA.

Clinics in Sports Medicine
|May 28, 2026
PubMed
Summary
This summary is machine-generated.

Relative energy deficiency in sport (RED-S) is a syndrome caused by low energy availability, impacting athlete health and performance. Early recognition and multidisciplinary treatment are crucial for managing this condition.

Keywords:
AmenorrheaIndicatorsLow energy availabilityRelative energy deficiency in sportReturn to sportSports nutritionSports psychology

Related Experiment Videos

Last Updated: May 31, 2026

Determining the Contribution of the Energy Systems During Exercise
11:15

Determining the Contribution of the Energy Systems During Exercise

Published on: March 20, 2012

Area of Science:

  • Sports Medicine
  • Exercise Physiology
  • Endocrinology

Background:

  • Relative energy deficiency in sport (RED-S), formerly the female athlete triad, is often overlooked.
  • It stems from insufficient energy intake relative to energy expenditure in athletes.
  • This condition can lead to widespread physiological and psychological impairments.

Purpose of the Study:

  • To highlight the under-recognition of RED-S among sports professionals.
  • To explain the multifactorial nature of RED-S driven by low energy availability (LEA).
  • To emphasize the systemic consequences of LEA on athlete health and performance.

Main Methods:

  • Review of current understanding and clinical presentation of RED-S.
  • Discussion of LEA as the central etiological factor.
  • Exploration of available risk assessment tools for athletes.

Main Results:

  • Low energy availability (LEA) is the primary driver of RED-S.
  • RED-S negatively affects multiple body systems, including physical and psychological function.
  • Consequences include increased injury rates and decreased athletic performance.

Conclusions:

  • RED-S requires greater awareness and recognition by coaches, physicians, and medical teams.
  • Risk assessment tools can aid in identifying and managing affected athletes.
  • Effective treatment necessitates a comprehensive, multidisciplinary approach.